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    <meta charset="UTF-8">
    <title>Title</title>
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=== 全等
	类型和值都要进行比较
== 等于
	只比较值

<script>
	var str1 = "abc";
	var str2 = "abc";
	console.log(str1 == str2);
	
	var a = 1;
	var b = "1";
	console.log(a === b);
	console.log(a == b);
</script>

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